Improvement in governors



UNITED STATES PATENT OFFICE;

' JAMES B. DUEEOE NEW Yonx, N. Y.

IMPROVEMENT IN G-OVERNORS.

Specification forming part of Letters Patent No. 137,662, dated April 8,1873 3 application tiled November 8, 1872.

To all whom it may concern:

Be it known that I, JAMES B. DUFF, of the city, county, and State of NewYork, have invented a new and useful Improvement in Governors forSteam-Engines; and I do hereby declare the following to be a full,clear, and

-exact description thereof, which will enable scribed in my patent, N o.126,039, dated April 23,1872. My present improvement consists in thearrangement of one or more rotary, centrifugal, or turbinate pistons, ortheir equivalent, mounted. on a shaft or rod running at right angles tothe rod of the governor-piston, in such a manner that the gear-wheelspreviously required for transmitting motion to the pump-piston can bedispensed with, and thereby the construction of the governor ismaterially' simplified and its durability increased 5 also, in combiningwith a governorpist-on two rotary, centrifugal, or turbinatepump-pistons mounted on the same or on different shafts, and moving incylinders which are separated from each other by a partition,

and each of which communicates with the governor-cylinder by a suitableport in such a manner that, by said partition, the current of liquidcreated by one of the pump-pistons is prevented from counteracting thecurrent created by the other pump-piston, and the full power of bothcurrents is brought to act on the governor-piston. I obtain the sameresult by making the two pistons into one, with a plate or-disk betweenthem whose diameter is larger than that of the pump-pistons, and wingsor blades, and revolves or rotates with the pistons. In this way theopposite currents may be counteracted, but I prefer the stationarypartition.

In the drawing, the letter A designates a cylinder, through whichextends a horizontal shaft, 13,011 which are mounted two pump- Fig. 2 isa horizontal pistons, C C. These pistons are provided with wings a a, orthey may be constructed in any desirable manner on the principle of thepiston of a rotary, centrifugal, or turbinate pump, and they work inshells D D flaring outward so that they conform'to the shape of thepumppistons. Saidshells terminate at some distance on eachside of apartition, E, which separates the pumps one from the other, leaving roomfor annular channels b b, which commu'- nicate, through ports c c, withthe governorcylinder F.

By this arrangement the current of liquid created by one pump-piston isprevented from counteractin g the current produced by the otherpump-piston; and, furthermore, the shaft B can be extended through oneof the heads of the pump-cylinder, so that a pulley, G, can be mountedthereon, and motion can be imparted to the pump-pistons by means of abelt running on said pulley without the intervention of gear-wheels. Ialso do away with the use of gear-wheels in using or operating a singlevertical, rotary, centrifugal, or turbinate piston by means of extendingthe vertical shaft of the piston downward through the bottom of thevertical cylinder, and, by means of a grooved pulley placed thereon; andby the application of a V-shaped or round belt running with a half orquarter turn or twist in it, I am enabled to run my belt fromahorizontal shaft from a grooved pulley to the grooved pulley on thevertical piston-shaft without my belt running off when the engine thatdrives it turns in a reverse direction; and thus doing away with thenecessity of using gear-wheels to get a right-angled movement, whichgears are very objectionable.

This last-named improvement applies. more particularly to the class ofgovernors described in my patent of April 23, 1872, No. 126,039, and isof much importance in the construction and durability of the governor.

`On the upper surface of the pump-cylinder' is formed a circularplatform, L, (see Fig. 2,) through which extend the ports c c, and thegovernor-cylinder F, which is open at the bottom, is bolted down uponthis platform. In

the cylinder F works the governor-piston H, the rod of which is pointedat the top, and ex tends up through a guide-box into a cap, I

which is secured in an eyeof a lever, J, that communicates with thethrottle-valve of the engine, and on which is secured a sliding weight,K, to adjust the governor to any desired speed of the engine. Theconnection between the cap I and the lever J is such that said cap canaccommodate itself to the varying positions of the lever without causingthe piston-rod to bind. From the upper part of the governor-cylinderextend pipes M down to the pump-cylinders, so that any liquid that mayleak past the governor-piston will find its way back into thepump-cylinders.

It will be readily seen that a single pumppiston might be mounted on thehorizontal shaft B, and, if this shaft is driven from the engine, thegovernor-piston will rise and fall as the speed of the engine increasesor decreases, and by running the shaft ofthe rotary, centrifugal, orturbinate pump-piston at rigmngles to the rod of the governor-piston Ihave materially simplified the construction of the whole mechanism; butin practice I prefer to use two pump-pistons with intervening partition,and I am enabled to produce a governor which is very sensitive, whichcan be driven with comparatively little power, and which is not liableto get out of order.

I will also remark that, for the governorpiston, an elastic diaphragmmight be substituted 5 but such device would be clearly a mechanicalequivalent for the piston.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination of two or more rotary, centrifugal, or turbinatepump-pistons with a governor-piston or its equivalent, substantially asdescribed.

2. In combination with a governor-piston or its equivalent, two or morerotary, centrifugal, or turbinate pistons mounted on the same shaft oron separate shafts, with a stationary or movable partition interveningbetween them, substantially as and for the purpose set forth.

3. The arrangement of one or more rotary, centrifugal, or turbiuatepump-pistons working in conjunction with a governor-piston or itsequivalent, and mounted on a shaft eX- tending through one of the headsof the pump-cylinder, and carrying a pulley for im parting motion to thepump piston or pistons, substantially as described.

Witnesses: J. B. DUFF.

W. HAUFF, E. F. KASTENHUBER.

